• Sipple's syndrome (medullary thyroid carcinoma-pheochromocytoma) 193
  • Sirenomelia 759.89
  • Siriasis 992.0
  • Sirkari's disease 085.0
  • SIRS (systemic inflammatory response syndrome) 995.90
  • Siti 104.0
  • Sitophobia 300.29
  • Situation, psychiatric 300.9
  • Situational
  • Situs inversus or transversus 759.3
  • Sixth disease 057.8
  • Sjögren (-Gougerot) syndrome or disease (keratoconjunctivitis sicca) 710.2
  • Sjögren-Larsson syndrome (ichthyosis congenita) 757.1
  • Skeletal - see condition
  • Skene's gland - see condition
  • Skenitis (see also Urethritis) 597.89
  • Skerljevo 104.0
  • Skevas-Zerfus disease 989.5
  • Skin - see also condition
  • SLAP lesion (superior glenoid labrum) 840.7
  • Slate-dressers' lung 502
  • Slate-miners' lung 502